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By: Travis Chaffin, Source: 2M CCTV
There are many times when CCTV cameras with built-in audio (microphones) seem like a great value and a great idea. If you're in the market for a camera with built-in audio, here are a couple of things to keep in mind.
CHECK CCTV DVR AUDIO INPUTS
Before thinking about the mics, think about the HD DVR. The microphones (even ones built-in to cameras) need an input on the DVR. Buying 8 cameras with 8 mics for an 8 channel DVR that only accepts 4 audio inputs is a frustrating experience. Make sure to view the specs of the DVR for the audio inputs and don't forget the speakers. The DVR will have an audio output but the speakers do not come with it.
AUDIO MICROPHONE PLACEMENT
For CCTV with audio, placement of the mics is as important as the placement of the cameras. As an example, consider an indoor room. If one CCTV camera and one microphone were used to monitor a room the camera should be in the corner to view the majority of the room. The audio however rarely takes place in the corner. An omni-directional mic placed in the center of the room is the best bet for quality recording. Because of these different placement requirements, we recommend separate mics that are not integrated into the camera.
LEGAL CONSIDERATIONS
Whether or not your CCTV system is using built-in audio or separate mics, there are some serious legal considerations you should know. For instance, in the US, CCTV with audio recording has different legal implications from state to state. So before installing audio recording devices, check the laws of your state.
